package com.example.reggie.service.impl;



import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.reggie.common.CustomException;
import com.example.reggie.entity.Category;
import com.example.reggie.entity.Dish;
import com.example.reggie.entity.Setmeal;
import com.example.reggie.mapper.CategoryMapper;
import com.example.reggie.service.CategoryService;
import com.example.reggie.service.DishService;
import com.example.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 老肥！！！
 * @Date: 2022/09/13/21:04
 * @Description: 不想学代码了！！！
 */
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    //    根据id删除分类，删除之前需要进行判断
    @Override
    public void remove(Long ids){
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper= new LambdaQueryWrapper<>();
//        添加查询条件，根据分类id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,ids);
        int count= dishService.count(dishLambdaQueryWrapper);
//        查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        if (count>0){
//             已经关联菜品,抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
//        查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(Setmeal::getCategoryId,ids);
        int count1 = setmealService.count(lambdaQueryWrapper);
        if (count1>0){
//                         已经关联套餐,抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
//        正常删除分类
        super.removeById(ids);
    }

}
